This new image, taken with the VLT Survey Telescope (VST) shows a wide variety of interacting galaxies in the young Hercules galaxy cluster. The sharpness of the picture and the sheer number of objects captured — across a full square degree — in less than three hours of observations attest to the great power of the VST and its OmegaCAM camera to explore the nearby Universe. This picture has been cropped and does not cover the full VST field of view.

@tiga tatton, I think these are satellite trails.
The picture is a composite image: different
observations are used for the red, green and blue
values of the pixels. So there seems to be an
object that was moving along the sky during the
'green' observation. (Note the colors are
false: what is green in the picture is not
necessarily green for our eyes.) These objects are
usually satellites. However, those stripes are
often longer and uninterrupted (and removed), so
it might be something else. Identifying artifacts
in images can be very hard in astronomy: how do
you tell the difference between something very
unusual but really out there and something
introduced by us?